Automatic switching system for instrument gas

Abstract

The utility model relates to an automatic switching system for instrument gas, which comprises a two-position three-way electromagnetic valve, a pressure sensor and a gas source processing device, a first inlet of the two-position three-way electromagnetic valve is connected with a normal instrument gas circuit, a second inlet is connected with an emergency instrument gas circuit, and an outlet is connected with the gas source processing device. An outlet of the gas source processing device is connected to a user using end, the pressure sensor is communicated with a normal instrument gas circuit, the two-position three-way solenoid valve keeps the first inlet communicated with the outlet in a normal state, and when the pressure sensor senses that the pressure in the normal instrument gas circuit is lower than a set value, the two-position three-way solenoid valve is switched to the second inlet communicated with the outlet. Under normal conditions, a normal instrument gas circuit can continuously supply gas to a user use end; however, if the normal instrument gas circuit loses pressure due to some reasons, the pressure sensor can detect sudden pressure drop, and at the moment, the two-position three-way electromagnetic valve can switch the second inlet to be communicated with the outlet, so that the emergency instrument gas circuit can continuously supply gas to avoid danger.

Description

Technical Field

[0001] The utility model relates to the technical field of gas supply systems, in particular to an automatic switching system for instrument gas. Background Art

[0002] The smelting process utilizes numerous pneumatic valves and components, all of which require instrument air at a certain pressure for control. When normal instrument air pressure becomes insufficient, emergency instrument air must be promptly switched to maintain normal equipment operation, potentially leading to production accidents. To avoid this problem, an automatic switching system is required to maintain pressure in pneumatic valves and components during emergencies. Summary of the Invention

[0003] The main purpose of the utility model is to provide an automatic switching system for instrument gas, which can automatically determine whether the pressure of the normal gas source is normal, and can switch to the emergency gas source in time when the pressure is lost to avoid accidents.

[0004] The utility model achieves the above-mentioned purpose through the following technical solutions: an automatic switching system for instrument gas, comprising a two-position three-way solenoid valve, a pressure sensor and an air source processing device, wherein the first inlet of the two-position three-way solenoid valve is connected to the normal instrument gas circuit, the second inlet is connected to the emergency instrument gas circuit, and the outlet is connected to the air source processing device, the air outlet of the air source processing device is connected to the user end, the pressure sensor is connected to the normal instrument gas circuit, and the two-position three-way solenoid valve maintains the first inlet and the air outlet connected when in normal state, and when the pressure sensor senses that the pressure in the normal instrument gas circuit is lower than the set value, the two-position three-way solenoid valve switches to the second inlet and connects to the air outlet.

[0005] Specifically, the air outlet of the two-position three-way solenoid valve is connected to the air source processing device by a hose.

[0006] Specifically, the air source processing device is composed of an air filter, a pressure reducing valve and an oil mist collector connected in sequence.

[0007] Specifically, the outlet of the gas source processing device is connected to the gas distribution seat, and the gas distribution seat is connected to different user ends through different branches, and each branch is provided with a ball valve.

[0008] The beneficial effects of the technical solution of this utility model are:

[0009] In the present invention, under normal circumstances, the normal instrument gas circuit will provide gas that meets the pressure requirements. At this time, the first inlet and the outlet are connected, so the normal instrument gas circuit will continue to supply gas to the user end; but if the normal instrument gas circuit loses pressure for some reason, the pressure sensor will detect the sudden drop in pressure. At this time, the two-position three-way solenoid valve will switch the second inlet and the outlet to be connected, so that the emergency instrument gas circuit can continue to supply gas to avoid danger. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a front view of an embodiment of an automatic instrument gas switching system;

[0011] Figure 2 The figure is a simplified piping diagram of the core part of the instrument gas automatic switching system in the embodiment.

[0012] The numbers in the figure represent:

[0013] 1-two-position three-way solenoid valve, 11-first inlet, 12-second inlet, 13-outlet;

[0014] 2-pressure sensor;

[0015] 3-Hose;

[0016] 4-air source processing device, 41-air filter, 42-pressure reducing valve, 43-oil mist collector. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to specific embodiments.

[0018] Example:

[0019] like Figure 1 and Figure 2 As shown, the utility model is used for the automatic switching system of instrument gas, including a two-position three-way solenoid valve 1, a pressure sensor 2 and an air source processing device 3. The first inlet 11 of the two-position three-way solenoid valve 1 is connected to the normal instrument gas circuit, the second inlet 12 is connected to the emergency instrument gas circuit, the air outlet 13 is connected to the air source processing device 4, the outlet of the air source processing device 4 is connected to the user end, the pressure sensor 2 is connected to the normal instrument gas circuit, and the two-position three-way solenoid valve 1 keeps the first inlet 11 and the air outlet 13 connected when it is normal. When the pressure sensor 2 senses that the pressure in the normal instrument gas circuit is lower than the set value, the two-position three-way solenoid valve 1 switches to connect the second inlet 12 with the air outlet 13.

[0020] Under normal circumstances, the normal instrument gas circuit will provide gas that meets the pressure requirements. At this time, the first inlet 11 is connected to the outlet 13, so the normal instrument gas circuit will continue to supply gas to the user end; but if the normal instrument gas circuit loses pressure for some reason, the pressure sensor 2 will detect the sudden drop in pressure. At this time, the two-position three-way solenoid valve 1 will switch the second inlet 12 to connect with the outlet 13, so that the emergency instrument gas circuit can continue to supply gas to avoid danger.

[0021] like Figure 1 As shown, the air outlet 13 of the two-position three-way solenoid valve 1 is connected to the air source processing device 4 via a hose 3 .

[0022] The hose 3 allows the relative position between the two-position three-way solenoid valve 1 and the air source processing device 3 to be flexibly adjusted to meet the installation requirements within the use space.

[0023] like Figure 2 As shown, the air source processing device 4 is composed of an air filter 41, a pressure reducing valve 42 and an oil mist collector 43 connected in sequence.

[0024] Its working principle is: compressed air first enters the air filter 41, and after being purified by water removal and ash filtration, it enters the pressure reducing valve 42. After pressure reduction, the gas pressure is controlled to meet the requirements of the pneumatic system. The output stabilized pressure gas finally enters the oil mist collector 43, where the lubricating oil is atomized and mixed with the compressed air and output to the outlet.

[0025] like Figure 1 As shown, the outlet of the gas source processing device 4 is connected to the gas distribution seat 5, and the gas distribution seat 5 is connected to different user ends through different branches, and a ball valve 6 is provided on each branch.

[0026] Automatic switching systems are typically used in pneumatic systems with multiple pneumatic valves and components to ensure the proper operation of the entire system. Therefore, the instrument air is distributed to each required location via the air distributor 5. Only those pneumatic valves and components in operation require the ball valves to maintain ventilation; the ball valves in the remaining branches can be closed.

[0027] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. An automatic switching system for instrument gas, characterized by: It includes a two-position three-way solenoid valve, a pressure sensor and an air source processing device. The first inlet of the two-position three-way solenoid valve is connected to the normal instrument air circuit, the second inlet is connected to the emergency instrument air circuit, and the outlet is connected to the air source processing device. The air outlet of the air source processing device is connected to the user end. The pressure sensor is connected to the normal instrument air circuit. The two-position three-way solenoid valve keeps the first inlet and the air outlet connected in normal state. When the pressure sensor senses that the pressure in the normal instrument air circuit is lower than the set value, the two-position three-way solenoid valve switches to the second inlet and connects with the air outlet.

2. The automatic switching system for instrument gas according to claim 1, characterized in that: The air outlet of the two-position three-way solenoid valve is connected to the air source processing device via a hose.

3. The automatic switching system for instrument gas according to claim 1, characterized in that: The air source processing device is composed of an air filter, a pressure reducing valve and an oil mist device connected in sequence.

4. The automatic switching system for instrument gas according to claim 1, characterized in that: The outlet of the gas source processing device is connected to the gas distribution seat, and the gas distribution seat is connected to different user ends through different branches, and each branch is provided with a ball valve.

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